i386/105616: UART PCI device just silent...

[Marcel Moolenaar]

The following reply was made to PR i386/105616; it has been noted by GNATS.

From: Marcel Moolenaar <xcllnt at mac.com>
To: Helge Oldach <puc-uart at oldach.net>
Cc: FreeBSD-gnats-submit at FreeBSD.org
Subject: Re: i386/105616: UART PCI device just silent...
Date: Sun, 26 Nov 2006 13:35:51 -0800

 On Nov 21, 2006, at 12:20 PM, Helge Oldach wrote:
 
 > Would you kindly advice on how to proceed?
 
 Hi Helge,
 
 I'm still trying to understand what the failure mode is and what may  
 cause
 it, so at this time I'm still looking for answers. Please bear with  
 me...
 
 I'll try to get one of those cards myself. That should help solve this.
 
 See below.
 
 > The "sysctl dev" delta between a "sio kernel" and an "uart kernel" is:
 >
 > 107,124c107,118
 > < dev.sio.4.%desc: Dolphin Peripherals 4036
 > < dev.sio.4.%driver: sio
 > < dev.sio.4.%parent: puc0
 > < dev.sio.5.%desc: Dolphin Peripherals 4036
 > < dev.sio.5.%driver: sio
 > < dev.sio.5.%parent: puc0
 > < dev.sio.0.%desc: Standard PC COM port
 > < dev.sio.0.%driver: sio
 > < dev.sio.0.%location: handle=\_SB_.PCI0.IBRG.COM1
 > < dev.sio.0.%pnpinfo: _HID=PNP0501 _UID=1
 > < dev.sio.0.%parent: acpi0
 > < dev.sio.0.wake: 0
 > < dev.sio.1.%desc: Standard PC COM port
 > < dev.sio.1.%driver: sio
 > < dev.sio.1.%location: handle=\_SB_.PCI0.IBRG.COM2
 > < dev.sio.1.%pnpinfo: _HID=PNP0501 _UID=2
 > < dev.sio.1.%parent: acpi0
 > < dev.sio.1.wake: 0
 > ---
 >> dev.uart.2.%desc: 16550 or compatible
 >> dev.uart.2.%driver: uart
 >> dev.uart.2.%parent: puc0
 >> dev.uart.3.%desc: 16550 or compatible
 >> dev.uart.3.%driver: uart
 >> dev.uart.3.%parent: puc0
 >> dev.uart.0.%desc: 16550 or compatible
 >> dev.uart.0.%driver: uart
 >> dev.uart.0.%parent: isa0
 >> dev.uart.1.%desc: 16550 or compatible
 >> dev.uart.1.%driver: uart
 >> dev.uart.1.%parent: isa0
 >
 > Maybe this gives some hint?
 
 One thing that strikes me as odd is that sio(4) attaches to acpi(4),
 while uart(4) attaches to isa(4). You mentioned that the kernels
 where otherwise identical, but that you had to update device.hints.
 I would expect uart(4) to attach to acpi(4) and not to isa(4).
 
 While this has nothing to do with puc(4), I'd like to know why this
 is happening. Could you send me a verbose dmesg of both kernels?
 
 thanks,
 
 -- 
 Marcel Moolenaar
 xcllnt at mac.com